He also created the Boy with Matted Hair in Antony Tudor’s Shadowplay, Prospero in Nureyev’s The Tempest and the leading rôle in Hans van Manen’s Four Schumann Pieces, for which he was the inspiration.
Cifarelli completed a lifelike sculpture of Rudolf Nureyev, the world-renowned ballet dancer; the head was presented to Nureyev at the Greek Theatre (Los Angeles).
Nicknamed "Nureyev" by sportswriters for his exciting and acrobatic fielding plays, Knoop played a deep second base, with exceptional range and a strong arm.
As well, Boutin-trained horses won the 1982 English 2,000 Guineas, the 1987 1,000 Guineas and the Matron Stakes in Ireland (Nureyev, ridden by stable jockey Philippe Paquet, finished first in the 1980 Two Thousand Guineas, but was later disqualified).
From 1988 to 1991 Giorgio Madia was engaged by Rudolf Nureyev to join him on his world farewell tour Nureyev and Friends.
In 1980, he finished the 2,000 Guineas in first place on the Boutin-trained Nureyev, but was later disqualified for impeding the progress of Posse, ridden by Pat Eddery.
There were also revivals of The Sleeping Beauty in the version by Peter Wright; Anna Karenina by Boris Eifman; Don Quixote by Rudolf Nureyev; choreography by Balanchine, Robbins, Neumeier, Tharp, and Forsythe; a Nureyev Gala; and the repertoire pieces Le Concours by Maurice Béjart and Marie Antoinette by Patrick de Bana.